Snow is falling in the mountains Tuesday morning, but the worst of the Thanksgiving week storm is yet to come.

A winter storm has moved into Colorado's mountains, bringing widespread snow, with 1 to 3 feet of accumulation possible by Wednesday afternoon. Rain will transition to snow overnight tonight for the Denver metro,

A storm that was pounding California's Sierra Nevada with snow Tuesday took aim at the Colorado Rockies and could roll east and slam the Appalachians on Thanksgiving Day, bringing unsettled travel weather to millions of Americans hitting the skies and roads for the holiday weekend.